<template>
  <div>
    <ul>
      <li v-for="(item, index) in arr" :key="index">{{ item }}</li>
    </ul>
    <button @click="run">快跑</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      arr: ["帅哥", "绝顶码农", "美女"],
    };
  },
  methods: {
    run() {
      const a = this.arr.splice(0, 1);
      this.arr = this.arr.concat(a);
    },
  },
};
</script>

<style scoped></style>
